450
FNCA52 TJSJ 140918
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
518 AM AST TUE OCT 14 2025
DISCUSSION
TODAY, SOUTHEASTERLY WINDS BETWEEN 8 - 12 MPH AND LOCALLY HIGHER
AREAS ARE EXPECTED ACROSS THE ISLANDS. ADDITIONALLY, TEMEPRATURES
SHOULD SLIGHTLY INCREASE, REMAINING ABOVE NORMAL. THE LATEST U.S.
DROUGHT MONITOR REPORT HIGHLIGHTS PORTIONS OF THE SOUTHERN COASTAL
PLAINS OF PUERTO RICO DUE ABNORMALLY DRY SOILS. ADDITIONALLY,
STATIONS IN CABO ROJO AND GUANICA REPORTED KDBI VALUES SLIGHTLY
ABOVE THRESHOLDS (584 AND 570 RESPECTIVELY). ALTHOUGH THIS AREA
MAY EXPECT HIGHER WINDS (BETWEEN 12 - 16 MPH) AND GUSTS UP TO 20
MPH, MINIMUM RELATIVE HUMIDITIES SHOULD REMAIN ABOVE THRESHOLDS
(57 - 59 %). ADDITIONALLY, PASSING SHOWERS MOVED DURING THE NIGHT
HOURS ACROSS THESE AREAS DUE TO A PERTURBATION IN THE TRADES.
GIVEN THE CURRENT CONDITIONS AND THE EXPECTED WEATHER FORECAST,
THE FIRE DANGER THREAT SHOULD REMAIN LOW TODAY.
PRZ014-150930-
SOUTHEAST COASTAL PLAINS-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 20
TEMP (24H TREND) 91 (+1) 73 (-3) 91
RH % (24H TREND) 59 (-3) 94 (+2) 61
WIND 20FT/EARLY(MPH) SE 12 E 9 S 8
WIND 20FT/LATE(MPH) SE 12 E 9 S 8
MIXING HGT(FT-AGL/MSL)4650 4400
TRANSPORT WND (MPH) E 13 S 7
VENT RATE (KT-FT) 51150 26400
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-150930-
SOUTHERN HILLS-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 20
TEMP (24H TREND) 88 (+3) 70 (-3) 87
RH % (24H TREND) 62 (-2) 98 (+5) 62
WIND 20FT/EARLY(MPH) SE 10 E 6 S 10
WIND 20FT/LATE(MPH) SE 10 E 6 S 10
MIXING HGT(FT-AGL/MSL)5220 5050
TRANSPORT WND (MPH) E 12 S 8
VENT RATE (KT-FT) 52200 35350
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-150930-
NORTH COASTAL PLAINS-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 0 80
TEMP (24H TREND) 91 (+1) 73 (-3) 92
RH % (24H TREND) 60 (-4) 98 (+4) 58
WIND 20FT/EARLY(MPH) E 13 SE 10 NW 13
WIND 20FT/LATE(MPH) E 13 SE 10 NW 13
MIXING HGT(FT-AGL/MSL)4890 4870
TRANSPORT WND (MPH) E 12 S 7
VENT RATE (KT-FT) 48900 29220
DISPERSION 5 5
DSI 6 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-150930-
NORTHERN HILLS-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 40 90
TEMP (24H TREND) 89 (+1) 70 (-3) 90
RH % (24H TREND) 63 (-1) 98 (+2) 60
WIND 20FT/EARLY(MPH) E 10 SE 9 W 11
WIND 20FT/LATE(MPH) E 10 SE 9 W 11
MIXING HGT(FT-AGL/MSL)5290 5130
TRANSPORT WND (MPH) SE 9 S 7
VENT RATE (KT-FT) 42320 30780
DISPERSION 5 5
DSI 6 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-150930-
WEST COAST-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 40 40
TEMP (24H TREND) 92 (+1) 72 (-2) 91
RH % (24H TREND) 61 (-1) 98 (+2) 63
WIND 20FT/EARLY(MPH) E 11 E 8 S 13
WIND 20FT/LATE(MPH) E 11 E 8 S 13
MIXING HGT(FT-AGL/MSL)4610 4730
TRANSPORT WND (MPH) SE 10 S 13
VENT RATE (KT-FT) 41490 52030
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-150930-
EASTERN INTERIOR-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 20 50
TEMP (24H TREND) 90 (+3) 70 (-4) 90
RH % (24H TREND) 61 (-4) 99 (+2) 60
WIND 20FT/EARLY(MPH) SE 10 SE 8 SW 9
WIND 20FT/LATE(MPH) SE 10 SE 8 SW 9
MIXING HGT(FT-AGL/MSL)5450 5490
TRANSPORT WND (MPH) SE 12 S 9
VENT RATE (KT-FT) 54500 43920
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-150930-
LUQUILLO MOUNTAIN RANGE-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 86 (+5) 69 (-4) 86
RH % (24H TREND) 66 (-6) 100 (+1) 65
WIND 20FT/EARLY(MPH) SE 10 SE 6 S 8
WIND 20FT/LATE(MPH) SE 10 SE 6 S 8
MIXING HGT(FT-AGL/MSL)4470 4230
TRANSPORT WND (MPH) SE 12 S 10
VENT RATE (KT-FT) 44700 38070
DISPERSION 5 5
DSI 6 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-150930-
CENTRAL MOUNTAIN RANGE-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 50 50
TEMP (24H TREND) 87 (+4) 68 (-3) 87
RH % (24H TREND) 63 (-2) 98 (+2) 63
WIND 20FT/EARLY(MPH) SE 8 SE 6 S 12
WIND 20FT/LATE(MPH) SE 8 SE 6 S 12
MIXING HGT(FT-AGL/MSL)5750 5530
TRANSPORT WND (MPH) E 9 S 8
VENT RATE (KT-FT) 46000 38710
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-150930-
CAYEY MOUNTAIN RANGE-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 30
TEMP (24H TREND) 85 (+2) 69 (-3) 85
RH % (24H TREND) 67 (-2) 100 (+1) 66
WIND 20FT/EARLY(MPH) SE 9 E 5 S 8
WIND 20FT/LATE(MPH) SE 9 E 5 S 8
MIXING HGT(FT-AGL/MSL)4830 4810
TRANSPORT WND (MPH) E 12 S 9
VENT RATE (KT-FT) 48300 38480
DISPERSION 5 5
DSI 6 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-150930-
VIEQUES-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 90 (+1) 75 (-2) 89
RH % (24H TREND) 60 (-2) 92 (-4) 59
WIND 20FT/EARLY(MPH) E 11 E 10 S 10
WIND 20FT/LATE(MPH) E 11 E 10 S 10
MIXING HGT(FT-AGL/MSL)3490 3340
TRANSPORT WND (MPH) E 15 S 12
VENT RATE (KT-FT) 45370 33400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-150930-
CULEBRA-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 92 (+2) 77 (-2) 92
RH % (24H TREND) 57 (-7) 92 (0) 57
WIND 20FT/EARLY(MPH) E 11 E 10 S 11
WIND 20FT/LATE(MPH) E 11 E 10 S 11
MIXING HGT(FT-AGL/MSL)3390 3390
TRANSPORT WND (MPH) E 14 S 13
VENT RATE (KT-FT) 40680 37290
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-150930-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 40
TEMP (24H TREND) 93 (+2) 74 (-2) 92
RH % (24H TREND) 57 (-2) 94 (+6) 58
WIND 20FT/EARLY(MPH) SE 16 G20 E 10 S 12
WIND 20FT/LATE(MPH) SE 16 G20 E 10 S 12
MIXING HGT(FT-AGL/MSL)4930 4770
TRANSPORT WND (MPH) SE 15 SE 10
VENT RATE (KT-FT) 64090 42930
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-150930-
SAINT THOMAS AND SAINT JOHN-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 40
TEMP (24H TREND) 87 (+1) 75 (-4) 87
RH % (24H TREND) 63 (-5) 97 (+4) 64
WIND 20FT/EARLY(MPH) E 11 E 10 S 10
WIND 20FT/LATE(MPH) E 11 E 10 S 10
MIXING HGT(FT-AGL/MSL)3420 3300
TRANSPORT WND (MPH) E 16 S 12
VENT RATE (KT-FT) 47880 33000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-150930-
ST CROIX-
518 AM AST TUE OCT 14 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 30
TEMP (24H TREND) 89 (+1) 75 (-3) 90
RH % (24H TREND) 63 (-4) 94 (+1) 63
WIND 20FT/EARLY(MPH) E 11 E 9 S 9
WIND 20FT/LATE(MPH) E 11 E 9 S 9
MIXING HGT(FT-AGL/MSL)4240 4190
TRANSPORT WND (MPH) E 14 S 10
VENT RATE (KT-FT) 50880 37710
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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